i have never heard people discussing it in here. well i havent tried the search function though, but it seems to me that everytime i see ama thread asking about amplifier recommendation, damping factor is never mentioned. a friend of mine, an acoustic expert / sound engineer helped me with my choices on an amplifier. i think i need 5 or 7 channel amp, around 125 watts per channel. if i found a 200 watts per channel amp for 5 channels not much more expensive than 125 wpc for 7 channels, i think i would prefer the 200 wpc 5 channels. okay, so i found b&k reference s2 125.7. msrp 1399 bucks. sherbourn 5/1500. msrp 1750 bucks. this one seems to be discontinued, i couldnt find it on sherbourn's website. so i compared the b&k with sherbourn 7/1250A for 2000 bucks msrp. my friend asked me to compare their damping factor, and it turned out that b&k amp's damping power is rated at 180 at 50 hz. the sherbourn is below 150 on the lower freq, if i am not mistaken on reading the graph. http://www.sherbourn.com/PDF/7_1250A...250aReview.pdf page 5 http://www.bkcomp.com/pdf/8445%20bkR...tsht.1.0.2.pdf page 2 so, my friend recommended b&k. cheaper as well. what do you guys think? while we are on it, any recommendation on an amplifier, around 1500 dollar, 5 or 7 channels, not less than 125 watt per channel? thank you.